Controlling amount of Scroll in Horizontal Scroll View

I have a Horizontal scroll view in my app which consists of 9 images. It has to display a set of 3 images at a time. I mean one scroll has to display a set of 3 images.

Now with the default behavior when i scroll f开发者_开发百科ast from right to left its getting to the final set of images. Is there any method to control the amount of scroll and achieve my requirement. Any sample code will be of great help